Well, if we can't be good buddies, maybe we can be pen pals.

The campaign of Virginia's Republican attorney general and candidate for governor, J. Marshall Coleman, has sent the first round of what could be a budding correspondence to his Democratic foe, Lt. Gov. Charles S. Robb.

It was a fund-raising letter sent to Robb's McLean home urging him to contribute to Coleman's campaign.

The letter, signed by Republican Gov. John N. Dalton, said his would-be successor needed $176,000 to finance his summer media program. "I've heard they have a pretty great computer," responded Robb's campaign manager, George Stoddart, of the GOP campaign machine, "but this is going a little too far."

Coleman officials said the letter went to 300,000 prospective donors, including "C.S. Robb." By way of explaining how one ended up in the Democratic candidate's mailbox, Coleman press aide David Blee said the letter "was sent to people whosympathized with the Republican Party or names on purchased mailing lists. Most likely, Chuck Robb's name came from the latter, but you never can tell."

Another Republican turned up for Prince George's County yesterday. Ilona Hogan, wife of Prince George's County Executive Lawrence J. Hogan (R), gave birth to a boy at Holy Cross Hospital in Silver Spring.

The newest Hogan, weighing 7 pounds, 10 ounces, is named Timothy Stephan. He is the couple's fourth son. Hogan also has two children by a previous marriage.

D.C. Mayor Marion Barry is expecting smoother sailing tonight as he prepares to cruise the Potomac with some potential contributors to an anticipated reelection campaign.

Barry invited about 25 of the locally prominent for the ride to Mt. Vernon aboard the former presidential yacht Sequoia. Among them are D.C. Democratic National Committeeman and businessman John R. Hechinger and former Greater Washington Board of Trade president R. Robert Linowes.

The cruise was organized by the Presidential Yacht Trust, which brought the boat back from Florida for presidential use and social events. And "strictly social" is what the Barry soiree was supposed to be, said Yacht Trust spokeswoman Vickie Taylor.

"We just want to tell them what we're doing, and we're seeking contributors to preserve the boat her in perpetuity," Taylor said.

Who was that man who walked out of The Star with the last -- the very last -- four copies?

Whoever he was, dollar signs seem to be in his future. While some vendors might have been getting a buck or two for one of last Friday's final final editions -- and some delivery vans were beseiged by souvenir hounds -- one person got the last four copies to roll off the presses.

The papers, and notarized statements that they are the last ones, have been consigned to C.J. Sloan's auction house, where they will be offered for sale in a fine arts auction, a company spokesman said yesterday.

Sloan's has not placed a value on the four copies yet, said appraiser Stephanie Kenyon, although they are expected to bring "considerably more than the ones that are floating around. It won't be an enormous amount," Kenyon opined. "Probably in the low hundreds."

Sloan's is not allowed to reveal names of consignors. Kenyon would allow, however, that it was "someone very close to The Star; probably an employe."